Come on guys, suck it up, I'll be 65 in June and am still working on heavy equipment, filed for Medicare yesterday.
Learn to work smarter, if you don't use a creeper lay on a piece of cardboard, you'll slide easier than just being on concrete. Roll on to your hands and knees to get up, I learned that trick when I fell off the creeper. And if you really need help tie a rope to something so you can pull yourself out from under the car. Figure out a way to get it done. My problem is that I refuse to accept my age. I still think I'm 30 something. Seriously though do what you are capable of and don't hurt yourself. We would joke about getting old and rewinding the motors of our electric wheelchairs and adding wheelie bars and racing around the nursing home.